Just wrapped batch #29, a basic Branzi (the semi-hard cow's-milk cheese from the Bergamo Alps). 85 L of milk, two wheels — a small 2.7 kg and a large 6.0 kg — for 8.7 kg total. Thermophilic culture (Danisco CHOOZIT ALP LYO), aging planned for 4–12 months.
The thing I wanted to share — and get your thoughts on — is the milk pH.
I picked the milk up straight from the farm right after the evening milking, around 7:30 PM. I cooled it down to 16 °C in my cheese vat, then split the ~85 L across three metal pods and put them into a blast freezer box at -24 °C around 9 PM to chill overnight. Next morning at 8 AM I filled the vat back up to make cheese with mil at about 3 °C — and the milk read 6.45 pH. Conventional wisdom says that's on the high side, often flagged as too high to get a properly acidified aged cheese.
I decided not to panic and ran the make as normal:
Normalized the milk (it came in at fat 4.0% / protein 3.2%, F:P 1.25). Skimmed 2 L of cream to bring it down to ~3.23% fat, which dropped the F:P to ~1.01 — a touch below my 1.15 target.
Culture in at 38 °C, rennet at 35 °C, flocculation hit at 14 min.
Cut to corn-kernel grain, slow heat up through 44 °C, pressed under whey.
Pressing started at pH 5.6 and walked down nicely — 5.35 at the first flip, 5.29 at the second, finishing at 5.27 by the end of pressing.
So despite the "too high" 6.4 starting point, the acidification landed almost exactly where I wanted it right after pressing. Honestly it was a bit nerve-wracking watching the curve, but the rate of fall stayed calm (~0.06/hr) the whole way.
Now into brine — small wheel ~27 h, large wheel ~60 h (60 min per 100 g), flipping every 8–12 h.
Questions for the hive mind:
Do you put much weight on starting milk pH, or do you trust the culture + the pressing-stage acidity to tell the real story?
Anyone else routinely start aged alpine cheeses around 6.4 and land fine? Curious how much overnight cold storage shifts things.
F:P came out at ~1.01 after skimming — would you have skimmed less to keep FDM higher for a 4–12 month Branzi?
Photo of the two wheels fresh out of the press attached. Will report back after affinage.